The grain boundary strengthening effect (GBSE) was investigated for nickel‐based superalloy bicrystals with various misorientations under different temperatures and loading directions. The results show that the GBSE is enhanced with the increase of misorientation and insensitive to the temperature and the loading direction relative to the GB also has a strong effect on the GBSE. On the other hand, the GBSE is often accompanied by GB cracking. The trend of grain boundary (GB) cracking is heightened with the increase of the misorientation and temperature, and the transformation of the loading direction from vertical to parallel.

中文翻译：

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镍基高温合金晶界强化作用的研究

研究了在不同温度和载荷方向下取向不同的镍基高温合金双晶的晶界强化效应（GBSE）。结果表明，GBSE随取向的增加而增强，并且对温度不敏感，相对于GB的加载方向也对GBSE有很强的影响。另一方面，GBSE通常伴随GB破解。取向差和温度的增加以及加载方向从垂直方向向平行方向的转变，使晶界（GB）开裂的趋势加剧。